Effect of Aging Time and Sonication Treatment on Hydroxyapatite Structure from Limestone

Abstract

Hydroxyapatite (HAp) nanoparticles from limestone were successfully synthesized using the precipitation method. HAp synthesis was carried out with variations in the aging time of 12, 24, 36, and 48 hours with sonication treatment. The HAp nanoparticles structure was characterized using FTIR, XRD, and SEM-EDX. The functional groups PO43-, OH-, and CO32- were detected by the infrared spectrum as the main groups of HAp nanoparticles. The hexagonal crystal structure of the HAp nanoparticles was confirmed on the XRD result. A non-uniform particle size of HAp nanoparticles detected on the SEM results undergoes agglomeration. In addition, the particle size ranged from 82.7 nm - 104.9 nm and decreased due to sonication treatment. In this study, it could be proved that the precipitation and sonication treatments are excellent for producing HAp nanoparticles.